#include <stdio.h>
#include "pe12-2a.h"
extern void set_mode(int mode);
extern void get_info();
extern show_info();
int main(void) {
    int mode;
    printf("Enter 0 for metric mode,1 for US mode: ");
    scanf("%d", &mode);
    while (mode >= 0) {
        set_mode(mode);
        get_info();
        show_info();
        printf(" Enter 0 for metric mode, 1 for US mode");
        printf(" (-1 to quit): ");
        scanf("%d", &mode);
    }
    printf(" Done.\n");
    return 0;
}